One of my colleagues asked for help with his car earlier this afternoon; turns out he ran a little too fast over a piece of logging that was a little too big, ripping off his Hyundai's sump protector and dislodging the oil filter. After a quick trek for parts, I replaced the filter, bolted on a new sump protector, topped up the oil, checked all fluid levels and taught him how to do so in case he ever feels like keeping up with his car's maintenance. Which he should. I also checked for any additional damage under the car and everything seemed fine.

Aside from voiding warranties (it was imperative his parents didn't find out about the "crash"), did I forget anything and/or did anything wrong?